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Iron carbonyl complexes bearing phenazine and acridine ligands: X-ray structures of Fe(CO)(3)(eta(4)-C12H8N2), Fe(CO)(2){P(OMe)(3)}(eta(4)-C12H8N2), Fe(CO)(2)(PPh3) (eta(4)-C13H9N), and Fe(CO)(2)(kappa(1)-dppm) (eta(4)-C12H8N2)

Chowdhury, MAH; Rahman, MS; Islam, MR; Rajbangshi, S; Ghosh, S; Hogarth, G; Tocher, DA; ... Kabir, SE; + view all (2016) Iron carbonyl complexes bearing phenazine and acridine ligands: X-ray structures of Fe(CO)(3)(eta(4)-C12H8N2), Fe(CO)(2){P(OMe)(3)}(eta(4)-C12H8N2), Fe(CO)(2)(PPh3) (eta(4)-C13H9N), and Fe(CO)(2)(kappa(1)-dppm) (eta(4)-C12H8N2). Journal of Organometallic Chemistry , 805 pp. 34-41. 10.1016/j.jorganchem.2015.12.023. Green open access

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Abstract

Reactions of Fe3(CO)12 with the heterocycles phenazine and acridine in refluxing benzene afforded the mononuclear complexes Fe(CO)3(η4-C12H8N2) (1a) and Fe(CO)3(η4-C13H9N) (1b), respectively. Treatment of 1a with P(OMe)3 and PPh3 in the presence of Me3NO at room temperature yielded the carbonyl substitution products Fe(CO)2{P(OMe)3}(η4-C12H8N2) (2a) and Fe(CO)2(PPh3) (η4-C12H8N2) (3a), respectively. Similar reactions of 1b yielded Fe(CO)2{P(OMe)3}(η4-C13H9N) (2b) and Fe(CO)2(PPh3) (η4-C13H9N) (3b). Treatment of 1a with the diphosphines dppm and dppf under similar conditions afforded the mononuclear compounds Fe(CO)2(κ1-dppm) (η4-C12H8N2) (4a) and Fe(CO)2(κ1-dppf) (η4-C12H8N2) (4b). Compounds 1a, 2a, 3b, and 4a have been structurally characterized by X-ray crystallography. The ancillary phenazine and acridine ligands in these products adopt an η4-coordination mode by using only the peripheral carbon atoms in one of the carbocyclic rings. Given the rarity of this coordination mode in metal carbonyl complexes, we have performed electronic structure calculations on 1a, and these data are discussed relative to the solid-state structure

Type: Article
Title: Iron carbonyl complexes bearing phenazine and acridine ligands: X-ray structures of Fe(CO)(3)(eta(4)-C12H8N2), Fe(CO)(2){P(OMe)(3)}(eta(4)-C12H8N2), Fe(CO)(2)(PPh3) (eta(4)-C13H9N), and Fe(CO)(2)(kappa(1)-dppm) (eta(4)-C12H8N2)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jorganchem.2015.12.023
Publisher version: http://dx.doi.org/10.1016/j.jorganchem.2015.12.023
Language: English
Additional information: Copyright © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Iron carbonyl, Phenazine, Acridine, Phosphines, X-ray structure, DFT calculations
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1475545
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